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L3 Networker

Guest Access via Captive Portal - problem with page not always appearing

I have set up a guest wifi network with an access point on an ethernet port of the PAN firewall.  The guest wifi network is unsecured.  I am using a web-form to ensure the guests see our logo, terms, and type in the correct password to proceed.

The setup works most of the time.  On occasion when using this setup via an Apple iOS device (iPhone, iPad) I don't get the portal page and instead receive an error on the idevice, "Hotspot login cannot open the page because the network connection was lost".  I can then only press cancel and it disconnects me from that wifi network.  If I hit cancel and try again, the same problem appears.  When hitting cancel on this the second time, I get presented with "use without internet or use other network".  Now if I click use without internet, and then open Safari and a website I do indeed get the captive portal.

I do not have this problem on any non iOS device (windows laptop, etc).

So, why sometimes does this happen to me?  It is not always repeatable on an iOS device.  I believe this is because the apple device is trying to initially open an HTTPS page.  Does that require me to enable SSL decryption?

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